System for heating cars



(No Model.) Y

J., F. MGELROY. SYSTEM FOR HEATING GARS.

Patented lVIaJIVfZG, 1889.

l fnl/wafer; Lm-es FMCEZM] N, PETERS. Phmlilhugnphr. Washingwn, D. CA

' UNITED STATES PATENT OFFICE JAMES F. MCELROY, OF LANSING, ASSIGNOR TOTHE MCELROY OAR HEATING COMPANY, OF DETROIT, MICHIGAN.

SPECIFICATION forming part of Letters Patent No. 400,350, dated March26, 1889.

Application filed December 2, 1887. Serial No. 256,764. (No model.) y

To all whom it may concern:

Be it known that I, JAMES F. McELRoY, a citizen of the United States,residing at Lansing, in the county of Ingham and State of Michigan, haveinvented certain new and useful Improvements in a System for HeatingCars, of which the following is a specication, reference being had therein to the accompanying drawing.

This invention relates to new and useful improvements in a system forheating cars; and the invention consists in the peculiar combination ofthe hot-water-circulating apparatus provided. with the ordinary stove orheater with means for heating the water of circulation independentlyfrom said stove or heater by means of steam supplied from the locomotiveor other source of supply; and to this end my invention consists in thepeculiar combination and arrangement of the parts, all as more fullyhereinafter set forth.

In the drawing which accompanies this specification, A represents astove or heater of a circulating hot-water apparatus.

B are the radiating-pipes in the car.

C is the expansion-drum.

D is the return-connection to the stove.

E is the outgoingconnection from the stove.

F is the outgoingconnection from the eX- pansion-drum to theradiating-pipes.

G is a vertical pipe or riser which connects the return end of theradiating-pipes with the expansion-drum, and to this riser are connectedthe outgoing and return connections E D of the heater or stove.

I-I is a main steam -pipe, preferably arranged below the car-floor andconnected with the locomotive or other available source of supply forconveying steam for heating the cars of the train.

I is a steam-supply pipe controlled by a suitable valve, J, leading fromthe main steampipe into the riser G, which it enters near the upper end,and then extending down inside said riser preferably continues withinthe lowest branch, K, of the radiatingpipes the whole length thereof,when it passes out and terminates, preferably, with a suitable airvalveor temperature trap, L, which discharges below the car-floor. The pipesG and K,I propose tovmake about two inches in diameter and thesteam-supply-pipe about one inch in diameter, so that when placed insidea sufficient space is left for the water of circulation equal or greaterthan the capacity of the one and one-half inch steam-pipe, whichvconnected with the steam-pipe on one side ythat it will heat the waterin both sides.

Branches of the steam-pipe may also be carried in different directionsand may jointly discharge into the same or into different traps.

The operation of my system willbe easily understood, as it is obviousthat if steam is admitted into the steam-supply pipe I such portion ofthe pipe I which is in operative contact with the water of circulationwill impart its heat to the water and thereby form a source of heating,which may be used independent of the stove whenever the supply of steamis available; or, if desired, both heaters may be in operation at thesame time. By placing the radiating steam-pipe within the radiatinghot-water pipes the heating lcapacity of the latter, which is generallythe least effective when run in the ordinary way, is greatly increased,while at the same time in my arrangement the hot-water circulationwithin the stove becomes short-circuited and little or no heat is wastedin the absence of re on account of the cooling-drafts which generallyare created through the stoves.

I do not broadly claim the combination with a hot-water circulatingsystem with a steam heater or radiator in operative contact with suchsystem and forming an independent means of heating therefor, as thatforms the subject of a prior application, but claim the specificconstruction by means vof whichI have accomplished the object ofmaintaining a hotwater-circulating apparatus of the 0r= dinary type asnow used in railroad-cars in operative condition by means of the heatdea rived from steam, or, if contingencies should arise, from lire inthe stove; and for this construction I claim, aside from its greatsimplieity, that it has the advantagev of a practically-independentsystem of heating, as it will readily be seen that the stove can bedetached (in case of necessary repair, for instance) without deprivingthe car of means for heating it.

Some of the features herein shown but not claimed are shown in myapplication, No. 280,339, filed March l0, 1887.

That I claim as my invention is- In a car-heating system, thecombination, with the lower branch, K, of the radiating pipes of acirculating hot-water system and the heater, of the riser G, connecting`said branch with the expansion-drum, the steampipe I, entering the riserGnear the top there- 0i and running downwardly through the riser andthrough the pipe K, and the outgoing and ingoiug connections D E betweenthe riser G- and the heater, substantially as described.

In testimony whereof I affix my signature, in presence of two Witnesses,this 22d day oi' November, 1887.

ISAAC B. BARRETT, R. M. FREDENDALL.

